Diners, Drive-Ins and Dives

Open 24/7

Guy Fieri goes 'round the clock at some great joints with great food at any hour of the day: The San Diego diner where they're flying fresh seafood in from New England; the 68-year-old Chicago institution where 3AM means veal parm and short rib dinners; and the Philadelphia diner that's still doing scrapple and creamed chipped beef.